You have presented some good examples such as museum as time machine and museums as a source of new ideas, but I think you have some problems in tense and sentence structure.
Museum is like a lake which you can grasp your lack.
I can't get what you mean by this sentence. Did you want to say something like this: Museum is like a lake from which you can grasp substances to compensate your lack?
Some people make a tour just to visit museums.
This is not a good cause!
Visiting museums would also be my priority if I travel to a city because: Oo riginally, what do you do when you encounter a something about which you don't have any information? about it
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Surely, you should refer to (go through) its catalog to get information.
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rise our Wittig (enhance our knowledge)
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Almost I did not know anything about Iraq.(I knew almost nothing about Iraq)
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and you see how our ancestors lived? .
...For a while I felt that I livelived in the past.
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One of my best experiment was done after visiting of The National Automobile Museum in Nevada. (Visiting the National Automobile Museum in Nevada is one of my best experiences.)
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worked like their real ones.
Good luck.